1// Copyright 2019 The Prometheus Authors
2// Licensed under the Apache License, Version 2.0 (the "License");
3// you may not use this file except in compliance with the License.
4// You may obtain a copy of the License at
5//
6// http://www.apache.org/licenses/LICENSE-2.0
7//
8// Unless required by applicable law or agreed to in writing, software
9// distributed under the License is distributed on an "AS IS" BASIS,
10// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11// See the License for the specific language governing permissions and
12// limitations under the License.
13package v1
14
15import (
16	"encoding/json"
17	"strconv"
18	"testing"
19	"time"
20
21	jsoniter "github.com/json-iterator/go"
22
23	"github.com/prometheus/common/model"
24)
25
26func generateData(timeseries, datapoints int) model.Matrix {
27	m := make(model.Matrix, 0)
28
29	for i := 0; i < timeseries; i++ {
30		lset := map[model.LabelName]model.LabelValue{
31			model.MetricNameLabel: model.LabelValue("timeseries_" + strconv.Itoa(i)),
32		}
33		now := model.Now()
34		values := make([]model.SamplePair, datapoints)
35
36		for x := datapoints; x > 0; x-- {
37			values[x-1] = model.SamplePair{
38				// Set the time back assuming a 15s interval. Since this is used for
39				// Marshal/Unmarshal testing the actual interval doesn't matter.
40				Timestamp: now.Add(time.Second * -15 * time.Duration(x)),
41				Value:     model.SampleValue(float64(x)),
42			}
43		}
44
45		ss := &model.SampleStream{
46			Metric: model.Metric(lset),
47			Values: values,
48		}
49
50		m = append(m, ss)
51	}
52	return m
53}
54
55func BenchmarkSamplesJsonSerialization(b *testing.B) {
56	for _, timeseriesCount := range []int{10, 100, 1000} {
57		b.Run(strconv.Itoa(timeseriesCount), func(b *testing.B) {
58			for _, datapointCount := range []int{10, 100, 1000} {
59				b.Run(strconv.Itoa(datapointCount), func(b *testing.B) {
60					data := generateData(timeseriesCount, datapointCount)
61
62					dataBytes, err := json.Marshal(data)
63					if err != nil {
64						b.Fatalf("Error marshaling: %v", err)
65					}
66
67					b.Run("marshal", func(b *testing.B) {
68						b.Run("encoding/json", func(b *testing.B) {
69							b.ReportAllocs()
70							for i := 0; i < b.N; i++ {
71								if _, err := json.Marshal(data); err != nil {
72									b.Fatal(err)
73								}
74							}
75						})
76
77						b.Run("jsoniter", func(b *testing.B) {
78							b.ReportAllocs()
79							for i := 0; i < b.N; i++ {
80								if _, err := jsoniter.Marshal(data); err != nil {
81									b.Fatal(err)
82								}
83							}
84						})
85					})
86
87					b.Run("unmarshal", func(b *testing.B) {
88						b.Run("encoding/json", func(b *testing.B) {
89							b.ReportAllocs()
90							var m model.Matrix
91							for i := 0; i < b.N; i++ {
92								if err := json.Unmarshal(dataBytes, &m); err != nil {
93									b.Fatal(err)
94								}
95							}
96						})
97
98						b.Run("jsoniter", func(b *testing.B) {
99							b.ReportAllocs()
100							var m model.Matrix
101							for i := 0; i < b.N; i++ {
102								if err := jsoniter.Unmarshal(dataBytes, &m); err != nil {
103									b.Fatal(err)
104								}
105							}
106						})
107					})
108				})
109			}
110		})
111	}
112}
113